Juniper MX204 Upgrade

    1. Check the current version.
    2. > show version
      Hostname: Router
      Model: mx204
      Junos: 18.2R1.9
      JUNOS OS Kernel 64-bit [20180614.6c3f819_builder_stable_11]

    3. go to https://support.juniper.net/support/downloads/ and select MX204, and search for newer version
    4. Select “Install Package” -> “VMHOST 64-BIT” -> “tgz”
    5. After login you will see a URL. Copy this URL
    6. Download the file onto your Juniper MX204, with this command

      > file copy “URL YOU COPIED”  /var/tmp/image-name.tgz

    7. You may validate the image with:

      > request system software validate /var/tmp/image-name.tgz

    8. Install the software:

      > request vmhost software add /var/tmp/image-name.tgz
      > request vmhost reboot

Source: https://www.juniper.net/documentation/en_US/junos/topics/concept/installation_upgrade.html